Rip timers values

According to the documentation timers basic has five arguments  "timers basic update invalid
holddown flush
[sleeptime]"



imageThe rate (time in seconds between updates) at which routing updates are sent


imageThe interval of time (in seconds) after which a route is declared invalid


imageThe interval (in seconds) during which routing information regarding better paths is suppressed


imageThe amount of time (in seconds) that must pass before a route is removed from the routing table


imageThe amount of time for which routing updates will be postponed

Is it correct to always calculate the flush time as (update interval + holdtime) = flush time

example: "timers basic 5 15 15 20" or "timers basic 7 10 10 17"

 

 

Comments

  • Pete,

     

    The flush time according to cisco by default is 60 seconds longer than the expiration time.  I always calculated this value as being 4x the update timer from viewing most examples you see out there in various documentation.  The RFC 1058 will explain to you a little more about RIP timers.  The default expiration time in the RFC is 120 seconds, so I don't think there is an actual formula to compute the expiration timer since the RFC and Cisco disagree. 

     

    Regards,

     

    CK

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